Games like The Stalked 2
Games like The Stalked 2 include Mouthwashing, What Remains of Edith Finch, Firewatch, SOMA, and Layers of Fear (2016). We matched them by the tags players give The Stalked 2 on Steam (Horror, Atmospheric, Thriller, Dark, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Mouthwashing
Shared: Horror · Atmospheric · Psychological Horror

What Remains of Edith Finch
Shared: Atmospheric · Story Rich · Mystery

Firewatch
Shared: Atmospheric · Story Rich · Mystery

SOMA
Shared: Horror · Atmospheric · Psychological Horror

Layers of Fear (2016)
Shared: Horror · Atmospheric · Psychological Horror

Sally Face - Episode One
Shared: Horror · Psychological Horror · Dark

No, I'm not a Human
Shared: Horror · Psychological Horror · Atmospheric

Amnesia: A Machine For Pigs
Shared: Horror · Atmospheric · Psychological Horror

Summer of '58
Shared: Horror · Atmospheric · Thriller

Poppy Playtime
Shared: Horror · Dark · Psychological Horror

Little Nightmares II
Shared: Horror · Atmospheric · Dark

Fears to Fathom - Ironbark Lookout
Shared: Horror · Atmospheric · Psychological Horror

Fears to Fathom - Norwood Hitchhike
Shared: Horror · Atmospheric · Psychological Horror

Little Nightmares
Shared: Horror · Atmospheric · Dark

MiSide
Shared: Horror · Psychological Horror · Story Rich

Still Wakes the Deep
Shared: Horror · Psychological Horror · Atmospheric

Psalm 5:9-13
Shared: Horror · Psychological Horror · Atmospheric

Detention
Shared: Horror · Atmospheric · Psychological Horror

The Park®
Shared: Horror · Psychological Horror · Atmospheric

Alan Wake
Shared: Horror · Thriller · Atmospheric

Outlast
Shared: Horror · Atmospheric · Psychological Horror

Outer Wilds
Shared: Atmospheric · Mystery · Story Rich

Visage
Shared: Horror · Psychological Horror · Dark

Hellblade: Senua's Sacrifice
Shared: Atmospheric · Horror · Dark